sha0403

2 years ago

a school has 63 students studying A,B and C. 33 study A, 25 study B, 26 study C. 10 study A and B, 9 study B and C while 8 study both A and C. Equal num study all three subjects as those who learn none of the three. How many study all 3 subjects?
#help me solve this question#

It is given that - Equal num study all three subjects as those who learn none of the three.
The people who do not study any of them are given by U - (A U B)
Here, U = 63 ..
And, A U B is given be (a+b+c+d+e)
and, I considered the people who study all the three as 'e'
And, Sorry, I did a mistake ..
I would be -> e = 63 - (a+b+c+d+e)